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检索条件"任意字段=IASTED International Conference on Applied Simulation and Modelling"

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modelling A THREE-WHEELED ELECTRIC CAR 15

MODELLING A THREE-WHEELED ELECTRIC CAR

引用

15th international conference on Bond Graph Modeling and simulation, ICBGM 2024

作者： Margetts, Rebecca Dept. Engineering Nottingham Trent University NottinghamNG11 8NS United Kingdom

This paper details the pilot study conducted to investigate the dynamics of an electric three-wheeled car design. The configuration was investigated using a series of models: the quarter car model to optimize ride dynamics, and the 'bicycle' model to assess handling. The models were constructed as bond graphs in 20Sim®, as part of a wider project which included the use of multibody dynamics software and virtual prototyping. These types of models are well-defined in the literature, but have yet to be applied to a three-wheeled car with electric hub motors. Suspension parameters are defined by optimizing the ride dynamics. The handling of the car can be seen to be superior to existing three-wheeled cars, but concerns remained about the rollover stability. This pilot study was used to suggest further work into the design and motivated an ongoing program of further work. © 2024 Society for Modeling & simulation international (SCS)

关键词： Automobile suspensions

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modelling of efficient project portfolios 23

Modelling of efficient project portfolios

引用

23rd international conference on modelling and applied simulation, MAS 2024

作者： Fiala, Petr Majovska, Renata Prague University of Economics and Business Department of Econometrics W. Churchill Sq. 4 Prague 313067 Czech Republic University of Finance and Administration Prague Department of Computer Science and Mathematics Estonska 500 Prague101 00 Czech Republic

ISBN: (纸本)9791281988019

Projects become tools to support the goals of the organisation. A project portfolio is the set of all projects that are currently being implemented in an organization. Possible projects are characterized by sets of inputs and outputs, where inputs are the resources to implement the project and outputs measure multiple goals of the organization. Data envelopment analysis (DEA) is an appropriate approach to select individual effective projects. The contribution of this paper is to propose a model to measure the effectiveness of the entire project portfolio. An organization has its total resources in limited quantity. Designing a portfolio of efficient projects that does not exceed the limited resources does not always lead to the most efficient portfolio. This paper proposes a new approach to project portfolio design based on the use of an extended DEA model. The constraint on the project portfolio is the total available budget. The performance measure of the designed project portfolio is the efficiency of the portfolio and the effectiveness of the outputs. In practice, this approach results in achieving better outputs with lower inputs in terms of the overall project portfolio. Possible extensions to this approach are formulated and discussed. © 2024 The Authors.

关键词： Data Envelopment Analysis multiple objectives Project portfolio

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Application of Model-Based System Engineering to a planetary rover design 11

Application of Model-Based System Engineering to a planetary...

引用

11th international conference on Control, Mechatronics and Automation (ICCMA)

作者： Castaing, Hugo Tang, Gilbert Chacin, Marco Bonnefoi, Fabien Cranfield Univ SATM Cranfield Beds England AIRBUS Automat Robot & Assembly Technol R&D Stevenage Herts England IPSA Comp Sci Paris France

ISBN: (纸本)9798350315684

Traditional system engineering methods have shown their limits when applied to highly complex systems such as rovers. In parallel, the digitalisation of the industry and the democratisation of the use of models in engineering force the system engineering field to adapt and change its practices by adopting a new approach: Model-Based System Engineering. This project aimed to provide a comprehensive example of an MBSE approach applied to a planetary rover design case study. The MathWorks MBSE toolchain is used to reverse engineer the NASA Sojourner rover. As a result, the defined requirements, and functional and logical architectures are implemented and dynamically linked together. Additionally, a multi-physical simulation model of the rover's power and mobility system is implemented. Requirements, architectures, and physical models are linked together to form a unique and comprehensive knowledge base, providing a vertical model-centric approach. The results of the simulation are used to conduct a trade study and deduct a design change for the system. The results presented in this study form the basis for a discussion aimed at evaluating the benefits and limitations of the MBSE approach mentioned in the scientific literature.

关键词： Model-based system engineering System engineering Planetary rover Multi-physical simulation modelling Simulink

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Generative AI and Retrieval-Augmented Generation (RAG) in an Agent-Based simulation Framework for Urban Planning 23

Generative AI and Retrieval-Augmented Generation (RAG) in an...

引用

23rd international conference on modelling and applied simulation, MAS 2024

作者： Bruzzone, Agostino Giovannetti, Antonio Genta, Giacomo Cefaliello, Daniele University of Genoa Via Balbi 5 Genoa16126 Italy Simulation Team Via Magliotto 2 Savona17100 Italy

ISBN: (纸本)9791281988019

Urban planning is a multifaceted discipline that requires balancing economic growth, environmental sustainability and community needs. Traditional approaches often rely on static data and manual analyses, which can be time-consuming and less responsive to real-time changes. This paper proposes a conceptual framework that integrates Generative AI and Retrieval-Augmented Generation (RAG) with the principles of strategic engineering to enhance urban planning simulations. By leveraging real-time data and advanced modeling and simulation capabilities, this framework addresses the complexity inherent in urban systems. Generative AI, exemplified by models such as GPT-4, excels at producing coherent and contextually relevant text, while RAG ensures the incorporation of up-to-date, domain-specific information. The framework employs autonomous agents within the simulation software to dynamically model various urban development scenarios, providing planners with actionable insights that promote sustainability. The proposed system enhances decision-making, operational efficiency and community engagement by offering real-time, data-driven insights. Furthermore, it aligns urban development projects with long-term sustainability goals, fostering transparency and public trust. This interdisciplinary approach, rooted in strategic engineering, promises to transform urban planning into a more adaptive, inclusive and resilient practice. © 2024 The Authors.

关键词： Digital elevation model

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Fretting Wear Evolution of Partially Compatible Materials 3

Fretting Wear Evolution of Partially Compatible Materials

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3rd international conference on Computational modelling, simulation and Optimization, ICCMSO 2024

作者： Singh, Krishnamurti Yadav, Ashu Das, Bimal Manipal University Jaipur Mechanical Engineering Department Jaipur India Ahmedabad University School of Engineering and Applied Science Ahmedabad India

ISBN: (纸本)9798350361391

Fretting wear tests using a pin on disc tribometer (MFT-5000, Rtec Instruments, USA) for the partially compatible material combinations are conducted at room temperature for different test durations with relative humidity (RH) of 50-60%. The effects of fretting time on the coefficient of friction and wear volume are analyzed. Worn surfaces are analysed using 3D WLI optical profilometer, optical microscope, and Scanning Electron Microscope (SEM). The result shows that the test duration has a considerable effect on the wear volume and its mechanism. With the increase of fretting duration, the coefficient of friction initially increases then stabilizes for remaining test time with a slight decrease. Time-dependent fretting wear transition from partial slip to gross sliding condition is also observed from the morphological study. Likewise, the wear mechanism also changed from localized adhesive degradation to the combined degradation of adhesion, oxidation, crack initiation, and delamination wear. © 2024 IEEE.

关键词： Adhesion

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Heuristic static single-source-single-sink shortest path algorithm——cycle-reducing algorithm, A∗ algorithm and dynamic simulation method 4

Heuristic static single-source-single-sink shortest path alg...

引用

4rth international conference on applied Mathematics, modelling, and Intelligent Computing, CAMMIC 2024

作者： Liu, Tianyu Luo, Cuicui School of Mathematical Sciences University of Chinese Academy of Sciences Yuquan Road Beijing100049 China International College of Chinese Academy of Sciences Haidian District Beijing100190 China

ISBN: (纸本)9781510681637

The shortest path problem has always been the most fundamental but extremely important problem in operations research and optimization research. Given a weighted graph (directed or undirected) G = (V, E, ω), |V| = n, |E| = m, and the two points s and t in G are the starting and ending points, respectively. The single source and single endpoint shortest path problem aims to find the shortest s-t path. The main contributions of this article are as follows: (1) Based on the cycle-reducing allgorithm, algorithm, a hierarchical single-source single-sink shortest path algorithm is obtained. The advantage of this algorithm is that it runs faster and avoids accessing all vertices in the graph to save time and storage space. (2) Based on the A∗ algorithm, a new lower bound distance estimation function is proposed to solve the single source and single endpoint problem. (3) Propose a dynamic simulation-based method for solving the shortest path problem: embed a nonnegative weighted graph into Euclidean space and use dynamic simulation software to solve the shortest s-t path. The advantage of this method is that it is very accurate and can solve all the shortest s-t paths without visiting too many keyless points. © 2024 SPIE.

关键词： Directed graphs

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Series-Connected Low Power Wind Turbines for Small-Scale Wind Farms 13

Series-Connected Low Power Wind Turbines for Small-Scale Win...

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13th IEEE international conference and Expositions on Electric and Power Engineering, EPEi 2024

作者： Radulescu, Andrei Viorel Serban, Ioan Transilvania University of Brasov Department of Electrical Engineering and Applied Physics Brasov Romania

ISBN: (纸本)9798350356199

The integration of small-scale wind turbines into the power grid presents an opportunity to harness renewable energy in a distributed and scalable manner. This paper focuses on the modelling and simulation of series-connected Permanent Magnet Synchronous Generators (PMSG) for small-scale wind farms. The key objectives are to analyse the dynamics of series-connected PMSGs, evaluate their performance, and assess their feasibility for small-scale wind energy applications. © 2024 IEEE.

关键词： Windmill

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The Mean Regeneration Cycle Length in a Constant Retrial Rate System 22nd

The Mean Regeneration Cycle Length in a Constant Retrial Rat...

引用

22nd international conference on Information Technologies and Mathematical modelling, ITMM 2023 and 14th international Workshop on Retrial Queues and Related Topics, WRQ 2023

作者： Morozov, Evsey Rogozin, Stepan Institute of Applied Mathematical Research Karelian Research Centre RAS Petrozavodsk185910 Russia Institute of Mathematics and Information Technologies Petrozavodsk State University Petrozavodsk185910 Russia Yaroslav-the-Wise Novgorod State University Novgorod the Great Russia

ISBN: (纸本)9783031653841

In this research, we consider a M/G/1-type single-class retrial system with constant retrial rate. First we use the regenerative approach to reprove the stability condition of this system, and then we obtain the explicit expressions for the mean regeneration cycle length and the mean number of customers arrived within regeneration cycle in the stationary regime. Finally, the discrete-event simulation is applied to illustrate the obtained theoretical results. © The Author(s), under exclusive license to Springer Nature Switzerland AG 2024.

关键词： Discrete event simulation

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A POSITION CONTROL MODELING METHOD FOR AN ORIGAMIINSPIRED FLEXURE-BASED PIEZOELECTRIC-ACTUATED MANIPULATOR 22

A POSITION CONTROL MODELING METHOD FOR AN ORIGAMIINSPIRED FL...

引用

22nd international conference on Micro and Nanotechnology for Power Generation and Energy Conversion Applications (PowerMEMS)

作者： Chen, Xu Halvorsen, Einar Kiziroglou, Michail E. Yeatman, Eric M. Imperial Coll London London England Univ South Eastern Norway Notodden Norway

ISBN: (纸本)9798350344219

The manuscript presents a modelling method for position control of a piezoelectric-actuated compliant mechanism. The method involves pseudo-rigid body (PRB) theory, linear electromechanical model of piezoelectric benders and Simulink-based simulation. In order to validate the modelling method, two experiments were designed and conducted. They are working volume estimation and voltage clip recurrence. The comparison between simulation and experimental results indicates that the modelling can predict the motion of the compliant structure and be used for optimization design. In future work, the model can be extended to include the hysteresis model of piezoelectric materials. Besides, the model can be applied together with an onboard visual feedback system to carry out a closed-loop control for higher precision motion.

关键词： Piezoelectric compliant structure modelling flexure precision robotics medical

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Molecular dynamics simulation of ultrasound-assisted 3D printing of aluminum matrix composites 4

Molecular dynamics simulation of ultrasound-assisted 3D prin...

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4rth international conference on applied Mathematics, modelling, and Intelligent Computing, CAMMIC 2024

作者： Zhang, Mengxuan Shang, Junjun Beijing University of Technology Beijing100124 China

ISBN: (纸本)9781510681637

Additive manufacturing technology, with its characteristics of no mold and short production cycle, provides a new scheme for the machining and manufacturing of high performance and difficult material parts. However, the forming process of additive manufacturing is non-equilibrium solidification, which is easy to form uneven microstructure and reduce the mechanical properties of the parts. Special energy field assisted forming technology has great potential in improving the manufacturing problems of high-strength difficult-to-process materials. In recent years, it has been continuously applied to additive manufacturing to improve the microstructure and properties of parts. Ultrasonic assistant is an important method to reduce the residual stress in the additive manufacturing process, and its scientific principle is still a frontier scientific issue. Therefore, this paper uses molecular dynamics (MD) method to study the influence of ultrasonic assistance on residual stress in additive manufacturing process. In this paper, the process of ultrasound-assisted 3D printing of graphene reinforced aluminum (Al) matrix composites was simulated by MD method. The effects of ultrasonic aid on grain size, orientation and dislocation in the composites were analyzed, and the mechanism of ultrasonic aid reduction of residual stress was revealed, which provided theoretical guidance for ultrasonic aid additive manufacturing process. © 2024 SPIE.

关键词： Molecular dynamics

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